If the phone show “Phone Freeze” message. This mean someone already tried to enter the wrong code into this phone too many time. You will require to order a defreeze code.

If after you enter the Unauthorized Sim Card and phone is not prompt to enter the Unlock Code and your Samsung is android, Go to the dial screen and press #7465625*638*# Once prompted for code, enter 8 digit Unlock Code.

Or

If you see “No Valid Sim Card” after you insert an Unauthorized Sim Card, remove the Unauthorized Sim Card and use the Authorized Sim Card or with NO Sim Card and follow this instruction.

1. Type #7465625*638*CODE# (CODE is the Unlock Code I sent you)

2. Phone deactivated message means its unlocked

Or

1. Switch ON the phone without a Sim Card (if this does not work try with a Unauthorized Sim Card first and if necessary try an Authorized Sim Card )

2. Type: #0111*CODE# (CODE is the Unlock Code I sent you)

Solution for “Network Unlock Unsuccessful” or “Code Error”

First check the IMEI you provide by type *#06# on the phone. If you provide the correct IMEI, then continue.

Troubleshoot Guide Solution #1

1. Turn the phone Wi-Fi OFF and then turn device ON without SIM card.

2. Type *7465625*638*#

3. You will see the NETWORK LOCK screen

4. In MCC/MNC field, enter MCC/MNC code for the provider you want to use. (example: enter 310260 if you want to use this phone for T-mobile USA Sim Card; 310410 or 310380 for AT&T). Check this link for complete MCCMNC for your provider:http://en.wikipedia.org/wiki/Mobile_Network_Code (It is very important to try all the MCC/MNC code if your New Sim Card Network has more than one code)

5. In CONTROL KEY field, enter the Unlock Code

6. Press OK

7. You should get a message: LOCK SUCCESSFUL

8. Turn off your phone, insert your New Network Sim Card and power ON. The phone should be unlocked. If this solutions does not work for your phone; Go to Solution #2

Follow these step carefully, as long as you have the correct code it will work 100%

1. Insert an Unauthorized Sim Card and power ON your phone. You will see “SIM Network Unlock PIN” or “Enter Network Lock Control Key” on the screen.

2. Type your Defreeze Code (MCK Code) and hit Unlock button. You will get a “Unsuccessful” message but don’t worry, this is normal.

3. Now type the Unlock code (Network or NCK Code) and hit Unlock button. If the phone say “Network Lock Successful” it worked and your phone unlocked. But if not, go on to step 4.

4. If you get “Unsuccessful”, hit Dismiss button and type *2767*3855# on phone keypad. (CAUTION! This will reformat all your data!, you will lost all data on the phone.)

5. After phone restarts, enter the Defreeze Code (MCK Code) when prompted at “SIM Network Unlock PIN” or “Enter Network Lock Control Key” screen and hit Unlock button. You will get a “Unsuccessful” message but don’t worry, this is normal.

6. Enter the Unlock Code (Network or NCK code) and hit Unlock button.

7. Your phone should now say “Network Lock Successful”

8. Now your phone is successfully unlocked!

Solution #1 (Samsung Galaxy S2, S3, Note , Note 2)

Follow these step carefully, as long as you have the correct code it will work 100% (Your phone must be updated to the latest firmware!)

1. Please trouble shoot as usual with the customer, the code must be correct and the phone MUST prompt for the code.

2. If nothing we can proceed to use the “release method” on the phone(s):

7. Your phone should now give you the message “Network Lock Successful”

Now your phone is successfully unlocked!

*If this is not working, go to Solution #3

Solution #3

1. Turn off the Wi-Fi on your phone and then turn device ON without SIM card.

Once it’s on go to phone dial screen and DIAL: *7465625*638*#

it will bring you to the NETWORK LOCK screen.

a in MCC/MNC field enter code for the service provider your phone is originally from (eg 31026 for T-Mobile USA) check here for list of codes: http://en.wikipedia.org/wiki/Mobile_Network_Code

*If your network has more than one mcc/mnc please try all of them this is very important

b. in CONTROL KEY field enter the UNLOCK code

c. hit OK

d. you should get a message: LOCK SUCCESSFUL

Solution #4 For samsung Phones ( video)

Solution #5 For samsung Galaxy S6

How to enter code in Samsung Galaxy S6 ?
You can enter unlock code using three following instructions:
1. Insert a foreig sim card (the sim card which is not supported by Your phone)
2. The phone should ask for an unlock code
3. Enter Unfreeze or Defreeze code ( unsuccesfull message may appear )
4. Enter NCK or Network code
The phone is now unlocked